"I am very pleased with our accomplishments this past quarter, which validate the momentum we have built. During the third quarter of 2018, we benefitted from solution sales across our global installed base, illustrating the depth and breadth of our product offerings as well as our extensive worldwide reach," said Fritz Hobbs, President and Chief Executive Officer of Ribbon Communications. "During the quarter, we also completed the acquisition of Edgewater Networks, which places us in a strategic position to benefit from growth in the enterprise Edge market."

Third Quarter 2018 Financial Highlights1,2,3

GAAP total revenue was $152 million (including $10 million of revenue attributable to the acquisition of Edgewater), compared with $137 million in the second quarter of 2018 and $75 million in the comparable period a year ago.

Non-GAAP total revenue was $159 million (including $10 million of revenue attributable to the acquisition of Edgewater), compared with $145 million in the second quarter of 2018 and $75 million in the comparable period a year ago.

GAAP net loss was $10 million, compared with a net loss of $20 million in the second quarter of 2018 and net income of $3 million in the comparable period a year ago.

Non-GAAP net income was $23 million, compared with $14 million in the second quarter of 2018 and $13 million in the comparable period a year ago.

GAAP loss per share was $0.10, compared with a loss per share of $0.20 in the second quarter of 2018 and GAAP diluted earnings per share of $0.07 in the comparable period a year ago.

Non-GAAP diluted earnings per share was $0.21, compared with $0.14 in the second quarter of 2018 and $0.26 in the comparable period a year ago.

Non-GAAP Adjusted EBITDA was $29 million, compared with $20 million in the second quarter of 2018 and $15 million in the comparable period a year ago.

Cash and investments were $43 million at September 30, 2018, compared with $55 million at the end of the second quarter of 2018 and $83 million at fiscal year-end 2017.

"Third quarter non-GAAP Revenue grew to $159 million and Adjusted EBITDA of $29 million grew 45 percent compared with the second quarter 2018. These results demonstrate solid execution of our ongoing strategic priorities as well as our integration efforts," said Daryl E. Raiford, Chief Financial Officer of Ribbon Communications. "We are adjusting our full year 2018 guidance to reflect better-than-expected third quarter results and the acquisition of Edgewater. We now expect full year 2018 non-GAAP Revenue to be approximately $610 million and Adjusted EBITDA to be in excess of $80 million. We continue to be focused on building a solid business, emphasizing profitability, and expect an end-of-year 2018 Adjusted EBITDA exit velocity in excess of $110 million."

Third Quarter 2018 Customer and Company Highlights

Continued delivery on a large fixed network transformation project for a North American Tier 1 service provider. The Company is less than halfway through this estimated 10-year deployment.

Expanded the capacities on deployed core SBCs and media gateways at two other North American Tier 1 service providers.

Deployed Ribbon's software-based SBC SWe product at a Canadian Tier 1 service provider.

Deployed our Enterprise SBC portfolio in the call center applications of two large global banks headquartered in the U.S. that are aggressively migrating to IP-based communications and replacing their legacy SBC vendor.

Continued expansion of the Company's deployments in the Cable Multi-System Operator (MSO) segment with Ribbon's advanced network-wide SBC portfolio at a large Tier 1 MSO.

Signed a contract with a large North American Tier 1 service provider for Kandy's White Label CPaaS solutions to enable embedded communications for its Enterprise customers.

Recognized revenue from the sale of our Ribbon Protect end-to-end security, network operations and analytics platform from our first customer, Softbank, and also signed our second customer, a large U.S.-based university.

1 The Sonus-GENBAND merger occurred on October 27, 2017. The consolidated financial results included in this press release represent the consolidated financial results of Sonus Networks, Inc. prior to October 27, 2017, and the consolidated financial results of Ribbon Communications on and after such date. The financial results of GENBAND are included in Ribbon Communications' consolidated financial results beginning October 27, 2017. 2 The acquisition of Edgewater Networks Inc. was completed on August 3, 2018. The financial results of Edgewater Networks are included in Ribbon Communications' consolidated financial results beginning August 3, 2018. 3 Please see the reconciliation of non-GAAP and GAAP financial measures and additional information about non-GAAP measures in the press release appendix.

Upcoming Fourth Quarter 2018 Investor Conference Schedule

November 8, 2018 – The Stephens Fall Investment Conference, Lotte New York Palace Hotel, New York City

December 4, 2018 –The Raymond James Technology Investors Conference, The Westin Grand Central Hotel, New York City

December 11, 2018 – Cowen's 5th Annual Networking & Cybersecurity Summit, Lotte New York Palace Hotel, New York City

Conference Call Details and Replay Information Ribbon Communications will offer a live, listen-only webcast of the conference call to discuss its financial results for the third quarter ended September 30, 2018 on October 30, 2018, via the investor section of its website at http://investors.ribboncommunications.com/press-and-events/events-and-presentations, where a replay will also be available shortly following the conference call.

A telephone playback of the call will be available following the conference call until November 13, 2018 and can be accessed by calling 800-633-8284 or +1-402-977-9140 for international callers. The reservation number for the replay is 21897045.

About Ribbon CommunicationsRibbon Communications is a company with two decades of leadership in real-time communications. Built on world-class technology and intellectual property, the company delivers intelligent, secure, embedded real-time communications for today's world. The company transforms fixed, mobile and enterprise networks from legacy environments to secure IP and cloud-based architectures, enabling highly productive communications for consumers and businesses. With a global footprint, Ribbon's innovative, market-leading portfolio empowers service providers and enterprises with rapid service creation in a fully virtualized environment. The company's Kandy real-time communications software platform delivers a comprehensive set of advanced embedded and unified (CPaaS and UCaaS) communications capabilities that enables this transformation. To learn more, visit ribboncommunications.com.

Important Information Regarding Forward-Looking Statements The information in this release contains "forward-looking" statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, which are subject to a number of risks and uncertainties. All statements other than statements of historical facts contained in this release, including without limitation statements made by our chief executive officer and our chief financial officer regarding our anticipated financial performance, the future results of operations, financial position, integration efforts and opportunities for the Company, business strategy, strategic position, and plans and objectives of management for future operations are forward-looking statements. Without limiting the foregoing, the words "believes", "estimates", "expects", "expectations", "intends", "may", and other similar language, whether in the negative or affirmative, are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

Forward-looking statements are based on our current expectations and assumptions regarding our business, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. Our actual results may differ materially from those contemplated in these forward-looking statements due to various risks, uncertainties and other important factors, including our ability to realize benefits from acquisitions that we have completed; the effects of disruption from the acquisitions we have completed, making it more difficult to maintain relationships with employees, customers or business partners; the timing of customer purchasing decisions and our recognition of revenues; economic conditions; our ability to recruit and retain key personnel; difficulties supporting our strategic focus on channel sales; difficulties retaining and expanding our customer base; difficulties leveraging market opportunities; the impact of restructuring and cost-containment activities; litigation; actions taken by significant stockholders; difficulties providing solutions that meet the needs of customers; market acceptance of our products and services; rapid technological and market change; our ability to protect our intellectual property rights; our ability to maintain partner, reseller, distribution and vendor support and supply relationships; higher risks in international operations and markets; the impact of increased competition; currency fluctuations; changes in the market price of our common stock; and/or failure or circumvention of our controls and procedures. For further information regarding risks and uncertainties associated with Ribbon Communications' business, please refer to the "Risk Factors" section of Ribbon Communications' most recent annual and quarterly report filed with the SEC. Any forward-looking statements represent Ribbon Communications' views only as of the date on which such statement is made and should not be relied upon as representing Ribbon Communications' views as of any subsequent date. While Ribbon Communications may elect to update forward-looking statements at some point, Ribbon Communications specifically disclaims any obligation to do so.

Discussion of Non-GAAP Financial Measures Ribbon Communications management uses several different financial measures, both GAAP and non-GAAP, in analyzing and assessing the overall performance of the business, making operating decisions, planning and forecasting future periods, and determining payments under compensation programs. Our annual financial plan is prepared both on a GAAP and non-GAAP basis, and the non-GAAP annual financial plan is approved by our board of directors. Continuous budgeting and forecasting for revenue and expenses are conducted on a non-GAAP basis (in addition to GAAP) and actual results on a non-GAAP basis are assessed against the annual financial plan. We consider the use of non-GAAP financial measures helpful in assessing the core performance of our continuing operations and when planning and forecasting future periods. By continuing operations, we mean the ongoing results of the business adjusted for acquisition-related revenue as a result of purchase accounting and the related cost of revenue, the impact of the new revenue standard, and excluding certain expenses and credits, including, but not limited to stock-based compensation, amortization of intangible assets, settlement expense, certain litigation costs, merger integration costs, acquisition-related facilities adjustments, acquisition- and integration-related expense, restructuring, the gains on the sales of intangible assets and reductions to income tax expense resulting from the reversal of reserves on our deferred tax assets. While our management uses non-GAAP financial measures as a tool to enhance their understanding of certain aspects of our financial performance, our management does not consider these measures to be a substitute for, or superior to, GAAP measures. In addition, our presentations of these measures may not be comparable to similarly titled measures used by other companies. These non-GAAP financial measures should not be considered alternatives for, or in isolation from, the financial information prepared and presented in accordance with GAAP.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures as an analytical tool. In particular, many of the adjustments to Ribbon's financial measures reflect the exclusion of items that are recurring and will be reflected in our financial results for the foreseeable future.

Acquisition-Related Revenue and Cost of Revenue; Impact of New Revenue Standard We provide the supplementary non-GAAP financial measures, non-GAAP Product revenue, non-GAAP Service revenue and non-GAAP Total revenue, which include revenue related to the acquisitions of GENBAND and Edgewater that we would have recognized but for the purchase accounting treatment of these transactions. We also include eliminated revenue resulting from our adoption in 2018 of the new revenue recognition standard. Because GAAP accounting requires the elimination of this revenue as well as the impact on future revenue of our adoption in 2018 of the new revenue standard, GAAP results alone do not fully capture all of our economic activities. These non-GAAP adjustments are intended to reflect the full amounts of such revenue and the related cost of revenue. We include these adjustments to allow for more complete comparisons to the financial results of our historical operations, forward-looking guidance and the financial results of peer companies. We believe these adjustments are useful to management and investors as a measure of the ongoing performance of the business. These adjustments do not accelerate revenue, but instead include revenue (and the related cost of revenue) that would have been recognized in our 2017 results, and included in our 2018 guidance and results, but for the purchase accounting and new revenue standard adjustments required by GAAP.

Stock-Based Compensation Stock-based compensation expense is different from other forms of compensation, as it is a non-cash expense. For example, a cash salary generally has a fixed and unvarying cash cost. In contrast, the expense associated with an equity-based award is generally unrelated to the amount of cash ultimately received by the employee, and the cost to us is based on a stock-based compensation valuation methodology, subjective assumptions and the variety of award types, all of which may vary over time. We evaluate performance without these measures because stock-based compensation expense is influenced by the Company's stock price and other factors such as volatility and interest rates that are beyond our control. The expense related to stock-based awards is generally not controllable in the short-term and can vary significantly based on the timing, size and nature of awards granted. As such, we do not include such charges in our operating plans, and we believe that presenting non-GAAP operating results that exclude stock-based compensation provides investors with visibility and insight into our management's method of analysis and the Company's core operating performance. It is reasonable to expect that stock-based compensation will continue in future periods.

Amortization of Intangible Assets We exclude the amortization of acquired intangible assets from non-GAAP expense and income measures. These amortization amounts are inconsistent in frequency and amount and are significantly impacted by the timing and size of acquisitions. Although we exclude amortization of acquired intangible assets from our non-GAAP expenses, we believe that it is important for investors to understand that intangible assets contribute to revenue generation. We believe that excluding the non-cash amortization of intangible assets facilitates the comparison of our financial results to our historical operating results and to other companies in our industry as if the acquired intangible assets had been developed internally rather than acquired. Amortization of intangible assets that relate to past acquisitions will recur in future periods until such intangible assets have been fully amortized.

Settlement Expense In the first quarter of 2018, we recorded $1.7 million of expense related to settlements, comprised of $1.4 million for the settlement of litigation in connection with our acquisition of Taqua LLC and $0.3 million of patent litigation settlement expense. In the third quarter of 2017, we recorded $1.6 million of expense related to potential fines in connection with the then-ongoing SEC investigation, which we paid to the SEC, along with an additional $0.3 million recorded in the fourth quarter of 2017, in the third quarter of 2018. These amounts are included as components of general and administrative expense. We believe that such settlement costs are not part of our core business or ongoing operations, are unplanned and generally not within our control. Accordingly, we believe that excluding costs such as the SEC potential fines and patent litigation settlement expense facilitates the comparison of our financial results to our historical operating results and to other companies in our industry.

Litigation Costs In connection with certain ongoing litigation between GENBAND and one of its competitors, we have incurred litigation costs beginning in the fourth quarter of 2017. In March 2018, we filed litigation on behalf of Sonus against the same competitor asserting additional intellectual property infringement. We expect to incur significant future litigation costs related to these matters. These costs are included as a component of general and administrative expense. We believe that such costs are not part of our core business or ongoing operations, are unplanned and generally not within our control. Accordingly, we believe that excluding the litigation costs related to this specific legal matter facilitates the comparison of our financial results to our historical operating results and to other companies in our industry.

Merger Integration Costs We consider certain merger integration costs to be unpredictable and dependent on a significant number of factors that may be outside of our control. These amounts represent costs related to the Merger initially recorded as a component of General and administrative expense in the third quarter of 2017. In the fourth quarter of 2017, we reclassified these merger integration costs, aggregating $0.2 million, to Acquisition- and integration-related expense. We do not consider these merger integration costs to be related to the continuing operations of the combined business or the Company. We believe that excluding merger integration costs facilitates the comparison of our financial results to our historical operating results and to other companies in our industry.

Acquisition-Related Facilities Adjustments GAAP accounting requires that the deferred rent liability of an acquired company be written off as part of purchase accounting and that the combined company's rent expense on a straight-line basis begin as of the acquisition date. As a result, we recorded more rent expense than would have been recognized but for the purchase accounting treatment of GENBAND's assumed deferred rent liability. We include this adjustment, which relates to the acquisition of GENBAND, to allow for more complete comparisons to the financial results of our historical operations, forward-looking guidance and the financial results of peer companies. We believe these adjustments provide an indication of the rent expense that would have been recognized, but for the purchase accounting in connection with the acquisition of GENBAND.

Acquisition- and Integration-Related Expense We consider certain acquisition- and integration-related costs to be unrelated to the organic continuing operations of our acquired businesses and the Company and they are generally not relevant to assessing or estimating the long-term performance of the acquired assets. In addition, the size, complexity and/or volume of an acquisition, which often drives the magnitude of acquisition- and integration-related costs, may not be indicative of future acquisition- and integration-related costs. By excluding these acquisition- and integration-related costs from our non-GAAP measures, management is better able to evaluate our ability to utilize our existing assets and estimate the long-term value that acquired assets will generate for us. We exclude certain acquisition- and integration-related costs to allow more accurate comparisons of our financial results to our historical operations, forward-looking guidance and the financial results of less acquisitive peer companies. In addition, we believe that providing supplemental non-GAAP measures that exclude these items allows management and investors to consider the ongoing operations of the business both with and without such expenses.

Restructuring We have recorded restructuring expense to streamline operations and reduce operating costs by closing and consolidating certain facilities and reducing our worldwide workforce. We review our restructuring accruals regularly and record adjustments (both expense and credits) to these estimates as required. We believe that excluding restructuring expense and credits facilitates the comparison of our financial results to our historical operating results and to other companies in our industry, as there are no future revenue streams or other benefits associated with these costs.

Gain on the Sale of Intangible Asset In the second quarter of 2017, we sold an intangible asset that we had acquired in connection with a previous acquisition. This amount is included as a component of other income, net. We believe that such gains are not part of our core business or ongoing operations; we had not used the intangible asset in connection with revenue-producing activities and would not have used it as such in the future. Accordingly, we believe that excluding from our results the other income arising from this sale facilitates the comparison of our financial results to our historical results and to other companies in our industry.

Tax Benefit Arising from Purchase Accounting In the third quarter of 2018, we assessed our ability to use our tax benefits and determined that it was more likely than not that some of these benefits will be recognized. As a result, we reduced our deferred tax asset valuation allowance, resulting in an income tax benefit of $0.8 million and reducing our income tax provision in both the three and nine months ended September 30, 2018. We believe that such a benefit is not part of our core business or ongoing operations, as it was the result of an acquisition and was unrelated to our revenue-producing activities. Accordingly, we believe that excluding the benefit arising from this adjustment to our income tax provision facilitates the comparison of our financial results to our historical results and to other companies in our industry.

Adjusted EBITDA We use Adjusted EBITDA as a supplemental measure to review and assess our performance. We calculate Adjusted EBITDA by excluding from net income (loss): interest income (expense), net; income tax benefit (provision); depreciation; and amortization of intangible assets. In addition, we exclude from net income (loss): adjustments to revenue and cost of revenue related to revenue reductions resulting from purchase accounting and adoption of the new revenue standard; stock-based compensation expense; settlement expense; certain litigation costs; merger integration costs; acquisition-related facilities adjustments; acquisition- and integration-related expense; restructuring; and other income, net. In general, we add back the expenses that we consider to be non-cash and/or not part of our ongoing operations. Adjusted EBITDA is a non-GAAP financial measure that is used by our investing community for comparative and valuation purposes. We disclose this metric to support and facilitate our dialogue with research analysts and investors. Other companies may calculate Adjusted EBITDA differently than we do, limiting its usefulness as a comparative measure.

We believe that providing non-GAAP information to investors, in addition to the GAAP presentation, will allow investors to view the financial results in the way management views them. We further believe that providing this information helps investors to better understand our core financial and operating performance and evaluate the efficacy of the methodology and information used by our management to evaluate and measure such performance.

The following tables provide the details of stock-based compensation, amortization of intangible assets, acquisition-related facilities adjustments, settlement expense, litigation costs and merger integration costs included as components of other line items in the Company's Consolidated Statements of Operations and the line items in which these amounts are reported.

Three months ended

September 30,

June 30,

September 30,

2018

2018

2017

Stock-based compensation

Cost of revenue - product

$ 21

$ 19

$ 75

Cost of revenue - service

65

67

199

Cost of revenue

86

86

274

Research and development expense

313

151

1,095

Sales and marketing expense

585

485

871

General and administrative expense

1,532

1,359

1,647

Operating expense

2,430

1,995

3,613

Total stock-based compensation

$ 2,516

$ 2,081

$ 3,887

Amortization of intangible assets

Cost of revenue - product

$ 10,593

$ 9,270

$ 1,601

Sales and marketing expense

2,855

2,694

692

Operating expense

2,855

2,694

692

Total amortization of intangible assets

$ 13,448

$ 11,964

$ 2,293

Acquisition-related facilities adjustment

Cost of revenue - product

$ 20

$ 20

$ -

Cost of revenue - service

60

61

-

Cost of revenue

80

81

-

Research and development expense

98

98

-

Sales and marketing expense

45

45

-

General and administrative expense

28

28

-

Operating expense

171

171

-

Total acquisition-related facilities adjustment

$ 251

$ 252

$ -

Settlement expense

General and administrative expense

$ -

$ -

$ 1,600

Litigation costs

General and administrative expense

$ 3,147

$ 1,901

$ -

Merger integration costs

General and administrative expense (A)

$ -

$ -

$ 178

(A) Amount recorded in Q3 2017 reclassified in Q4 2017 to "Acquisition- and integration-related expense."

RIBBON COMMUNICATIONS INC.

Supplemental Information

(in thousands)

(unaudited)

The following tables provide the details of stock-based compensation, amortization of intangible assets, acquisition-related facilities adjustments, settlement expense, litigation costs, merger integration costs and the gain on the sale of an intangible asset included as components of other line items in the Company's Consolidated Statements of Operations and the line items in which these amounts are reported.

Nine months ended

September 30,

September 30,

2018

2017

Stock-based compensation

Cost of revenue - product

$ 91

$ 261

Cost of revenue - service

264

777

Cost of revenue

355

1,038

Research and development expense

1,364

3,650

Sales and marketing expense

1,944

1,690

General and administrative expense

3,758

5,009

Operating expense

7,066

10,349

Total stock-based compensation

$ 7,421

$ 11,387

Amortization of intangible assets

Cost of revenue - product

$ 29,455

$ 4,768

Sales and marketing expense

8,266

2,077

Operating expense

8,266

2,077

Total amortization of intangible assets

$ 37,721

$ 6,845

Acquisition-related facilities adjustment

Cost of revenue - product

$ 57

$ -

Cost of revenue - service

172

-

Cost of revenue

229

-

Research and development expense

278

-

Sales and marketing expense

128

-

General and administrative expense

79

-

Operating expense

485

-

Total acquisition-related facilities adjustment

$ 714

$ -

Settlement expense

General and administrative expense

$ 1,730

$ 1,600

Litigation costs

General and administrative expense

$ 5,721

$ -

Merger integration costs

General and administrative expense (A)

$ -

$ 178

Gain on the sale of intangible asset

Other (expense) income, net

$ -

$ 576

(A) Amount recorded in Q3 2017 reclassified in Q4 2017 to "Acquisition- and integration-related expense."

RIBBON COMMUNICATIONS INC.

Reconciliation of Non-GAAP and GAAP Financial Measures

(in thousands, except percentages)

(unaudited)

Three months ended

September 30,

June 30,

September 30,

2018

2018

2017

GAAP Product revenue

$ 77,283

$ 63,123

$ 44,120

Acquisition-related revenue adjustment

2,178

1,741

-

Adjustment for new revenue standard

1,778

2,437

-

Non-GAAP Product revenue

$ 81,239

$ 67,301

$ 44,120

GAAP Service revenue

$ 75,185

$ 74,238

$ 30,509

Acquisition-related revenue adjustment

1,885

2,547

-

Adjustment for new revenue standard

400

512

-

Non-GAAP Service revenue

$ 77,470

$ 77,297

$ 30,509

GAAP Total revenue

$ 152,468

$ 137,361

$ 74,629

Acquisition-related revenue adjustment

4,063

4,288

-

Adjustment for new revenue standard

2,178

2,949

-

Non-GAAP Total revenue

$ 158,709

$ 144,598

$ 74,629

GAAP Gross margin - product

49.7%

52.0%

78.0%

Acquisition-related revenue adjustment

1.0%

0.9%

0.0%

Acquisition-related cost of revenue adjustment

0.0%

0.0%

0.0%

Adjustment for new revenue standard

0.8%

1.2%

0.0%

Adjustment to cost of revenue for new revenue standard

0.0%

0.0%

0.0%

Stock-based compensation

*

*

0.2%

Amortization of intangible assets

13.7%

14.7%

3.6%

Acquisition-related facilities adjustment

*

*

0.0%

Non-GAAP Gross margin - product

65.2%

68.8%

81.8%

GAAP Gross margin - service

58.3%

56.9%

66.0%

Acquisition-related revenue adjustment

1.0%

1.4%

0.0%

Acquisition-related cost of revenue adjustment

0.0%

0.0%

0.0%

Adjustment for new revenue standard

0.2%

0.3%

0.0%

Adjustment to cost of revenue for new revenue standard

0.0%

0.0%

0.0%

Stock-based compensation

0.1%

0.1%

0.6%

Acquisition-related facilities adjustment

0.1%

0.1%

0.0%

Non-GAAP Gross margin - service

59.7%

58.8%

66.6%

GAAP Total gross margin

53.9%

54.7%

73.1%

Acquisition-related revenue adjustment

1.0%

1.1%

0.0%

Acquisition-related cost of revenue adjustment

0.0%

0.0%

0.0%

Adjustment for new revenue standard

0.5%

0.8%

0.0%

Adjustment to cost of revenue for new revenue standard

0.0%

0.0%

0.0%

Stock-based compensation

0.1%

0.1%

0.4%

Amortization of intangible assets

6.9%

6.7%

2.1%

Acquisition-related facilities adjustment

0.1%

0.1%

0.0%

Non-GAAP Total gross margin

62.5%

63.5%

75.6%

GAAP Total gross profit

$ 82,234

$ 75,111

$ 54,547

Acquisition-related revenue adjustment

4,063

4,288

-

Acquisition-related cost of revenue adjustment

-

-

-

Adjustment for new revenue standard

2,178

2,949

-

Adjustment to cost of revenue for new revenue standard

-

-

-

Stock-based compensation

86

86

274

Amortization of intangible assets

10,593

9,270

1,601

Acquisition-related facilities adjustment

80

81

-

Non-GAAP Total gross profit

$ 99,234

$ 91,785

$ 56,422

GAAP Research and development expense

$ 34,403

$ 35,604

$ 20,798

Stock-based compensation

(313)

(151)

(1,095)

Acquisition-related facilities adjustment

(98)

(98)

-

Non-GAAP Research and development expense

$ 33,992

$ 35,355

$ 19,703

GAAP Sales and marketing expense

$ 31,488

$ 30,738

$ 17,454

Stock-based compensation

(585)

(485)

(871)

Amortization of intangible assets

(2,855)

(2,694)

(692)

Acquisition-related facilities adjustment

(45)

(45)

-

Non-GAAP Sales and marketing expense

$ 28,003

$ 27,514

$ 15,891

* Less than 0.1% impact on gross margin.

RIBBON COMMUNICATIONS INC.

Reconciliation of Non-GAAP and GAAP Financial Measures

(in thousands, except percentages)

(unaudited)

Three months ended

September 30,

June 30,

September 30,

2018

2018

2017

GAAP General and administrative expense

$ 15,942

$ 15,028

$ 10,833

Stock-based compensation

(1,532)

(1,359)

(1,647)

Settlement expense

-

-

(1,600)

Litigation costs

(3,147)

(1,901)

-

Merger integration costs (A)

-

-

(178)

Acquisition-related facilities adjustment

(28)

(28)

-

Non-GAAP General and administrative expense

$ 11,235

$ 11,740

$ 7,408

GAAP Operating expenses

$ 89,800

$ 91,747

$ 50,628

Stock-based compensation

(2,430)

(1,995)

(3,613)

Amortization of intangible assets

(2,855)

(2,694)

(692)

Settlement expense

-

-

(1,600)

Litigation costs

(3,147)

(1,901)

-

Merger integration costs (A)

-

-

(178)

Acquisition-related facilities adjustment

(171)

(171)

-

Acquisition- and integration-related expense

(5,570)

(4,280)

(1,543)

Restructuring

(2,397)

(6,097)

-

Non-GAAP Operating expenses

$ 73,230

$ 74,609

$ 43,002

GAAP Income (loss) from operations

$ (7,566)

$ (16,636)

$ 3,919

Acquisition-related revenue adjustment

4,063

4,288

-

Acquisition-related cost of revenue adjustment

-

-

-

Adjustment for new revenue standard

2,178

2,949

-

Adjustment to cost of revenue for new revenue standard

-

-

-

Stock-based compensation

2,516

2,081

3,887

Amortization of intangible assets

13,448

11,964

2,293

Settlement expense

-

-

1,600

Litigation costs

3,147

1,901

-

Merger integration costs (A)

-

-

178

Acquisition-related facilities adjustment

251

252

-

Acquisition- and integration-related expense

5,570

4,280

1,543

Restructuring

2,397

6,097

-

Non-GAAP income from operations

$ 26,004

$ 17,176

$ 13,420

GAAP Income (loss) from operations as a percentage of revenue

-5.0%

-12.1%

5.3%

Acquisition-related revenue adjustment

2.7%

3.6%

0.0%

Acquisition-related cost of revenue adjustment

0.0%

0.0%

0.0%

Adjustment for new revenue standard

1.4%

2.0%

0.0%

Adjustment to cost of revenue for new revenue standard

0.0%

0.0%

0.0%

Stock-based compensation

1.6%

1.4%

5.2%

Amortization of intangible assets

8.5%

8.3%

3.1%

Settlement expense

0.0%

0.0%

2.1%

Litigation costs

2.0%

1.3%

0.0%

Merger integration costs (A)

0.0%

0.0%

0.2%

Acquisition-related facilities adjustment

0.2%

0.2%

0.0%

Acquisition- and integration-related expense

3.5%

3.0%

2.1%

Restructuring

1.5%

4.2%

0.0%

Non-GAAP Income from operations as a percentage of revenue

16.4%

11.9%

18.0%

(A) Amount recorded in Q3 2017 reclassified in Q4 2017 to "Acquisition- and integration-related expense."

RIBBON COMMUNICATIONS INC.

Reconciliation of Non-GAAP and GAAP Financial Measures

(in thousands, except per share amounts)

(unaudited)

Three months ended

September 30,

June 30,

September 30,

2018

2018

2017

GAAP Net income (loss)

$ (10,158)

$ (19,922)

$ 3,453

Acquisition-related revenue adjustment

4,063

4,288

-

Acquisition-related cost of revenue adjustment

-

-

-

Adjustment for new revenue standard

2,178

2,949

-

Adjustment to cost of revenue for new revenue standard

-

-

-

Stock-based compensation

2,516

2,081

3,887

Amortization of intangible assets

13,448

11,964

2,293

Settlement expense

-

-

1,600

Litigation costs

3,147

1,901

-

Merger integration costs (A)

-

-

178

Acquisition-related facilities adjustment

251

252

-

Acquisition- and integration-related expense

5,570

4,280

1,543

Restructuring

2,397

6,097

-

Tax benefit arising from purchase accounting

(841)

-

-

Non-GAAP Net income

$ 22,571

$ 13,890

$ 12,954

Earnings (loss) per share:

GAAP Diluted earnings per share or (loss) per share

$ (0.10)

$ (0.20)

$ 0.07

Acquisition-related revenue adjustment

0.04

0.04

-

Acquisition-related cost of revenue adjustment

-

-

-

Adjustment for new revenue standard

0.02

0.03

-

Adjustment to cost of revenue for new revenue standard

-

-

-

Stock-based compensation

0.02

0.02

0.08

Amortization of intangible assets

0.14

0.13

0.05

Settlement expense

-

-

0.03

Litigation costs

0.03

0.02

-

Merger integration costs (A)

-

-

*

Acquisition-related facilities adjustment

*

*

-

Acquisition- and integration-related expense

0.05

0.04

0.03

Restructuring

0.02

0.06

-

Tax benefit arising from purchase accounting

(0.01)

-

-

Non-GAAP Diluted earnings per share

$ 0.21

$ 0.14

$ 0.26

Shares used to compute diluted earnings per share or (loss) per share

GAAP Shares used to compute diluted earnings per share or (loss) per share

104,918

102,160

50,131

Non-GAAP Shares used to compute diluted earnings per share

105,726

102,334

50,131

Adjusted EBITDA:

GAAP Net income (loss)

$ (10,158)

$ (19,922)

$ 3,453

Interest (income) expense, net

1,420

735

(260)

Income tax (benefit) provision

(82)

499

727

Depreciation

2,952

2,811

1,660

Amortization of intangible assets

13,448

11,964

2,293

Acquisition-related revenue adjustment

4,063

4,288

-

Acquisition-related cost of revenue adjustment

-

-

-

Adjustment for new revenue standard

2,178

2,949

-

Adjustment to cost of revenue for new revenue standard

-

-

-

Stock-based compensation

2,516

2,081

3,887

Settlement expense

-

-

1,600

Litigation costs

3,147

1,901

-

Merger integration costs (A)

-

-

178

Acquisition-related facilities adjustment

251

252

-

Acquisition- and integration-related expense

5,570

4,280

1,543

Restructuring

2,397

6,097

-

Other expense (income), net

1,254

2,052

(1)

Non-GAAP Adjusted EBITDA

$ 28,956

$ 19,987

$ 15,080

* Less than $0.01 impact on earnings (loss) per share

(A) Amount recorded in Q3 2017 reclassified in Q4 2017 to "Acquisition- and integration-related expense."